diff --git a/src/simulator/decode.rs b/src/simulator/decode.rs
index dea62b6..91c8651 100644
--- a/src/simulator/decode.rs
+++ b/src/simulator/decode.rs
@@ -41,7 +41,7 @@ pub fn decode(val : u64) -> Instruction {
     let rs3             = ((val >> 27) & 0x1f) as u8;
     let rd              = ((val >> 7) & 0x1f) as u8;
     let funct7          = ((val >> 25) & 0x7f) as u8;
-    let funct7_smaller  = (funct7 & 0x3e) as u8;
+    let funct7_smaller  = funct7 & 0x3e;
     
     let funct3          = ((val >> 12) & 0x7) as u8;
     let imm12_I         = ((val >> 20) & 0xfff) as u16;
@@ -52,7 +52,7 @@ pub fn decode(val : u64) -> Instruction {
     
     let imm13           = (((val >> 19) & 0x1000) + ((val >> 20) & 0x7e0) +
                         ((val >> 7) & 0x1e) + ((val << 4) & 0x800)) as i16;
-    let imm13_signed    = if imm13 >= 4096 { imm13 - 8192 } else { imm13 } as i16;
+    let imm13_signed    = if imm13 >= 4096 { imm13 - 8192 } else { imm13 };
     
     let imm31_12        = (val & 0xfffff000) as u32;
     let imm31_12_signed = imm31_12 as i32;